Simulation on the effect of the combustion parameters on the piston dynamics and engine performance using the Wiebe function in a free piston engine

Kim, Jaeheun; Bae, Choongsik; Kim, Gangchul

doi:10.1016/j.apenergy.2013.02.056

Cited by 74 publications

(30 citation statements)

References 15 publications

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“…This theory is also supported by [22] in that higher motoring velocity (initial velocity) produces less clearance volume which relates to higher compression ratio. The experimental works presented had a different outcome, however.…”

Section: Relation Between Battery Capacity Compression Ratio and In-supporting

confidence: 58%

“…Depending on the type of fuel used, the optimum motoring velocity range is from 2.5 m/s to 3.5 m/s. Fuels with a slower burning rate are suitable for lower motoring speed but faster motoring speed requires a faster burning rate of fuel [22]. In Figure 4, the maximum velocity recorded is 2 m/s and a slower burning fuel is suitable for use at this speed; the expected expansion speed is 3.25 m/s.…”

Section: Motoring Fplgmentioning

confidence: 96%

“…It was noted that higher indicated mean effective pressure (IMEP) was desirable for increasing the potential energy since the piston kinetic energy was directly proportional to the IMEP value and thus higher initial velocity (motoring velocity) produces higher IMEP. This was proved when the highest IMEP produced was at 0.49 MPa at 4 m/s initial piston velocity compared with a lower initial velocity at 1.5 m/s and 2 m/s which produced 0.35 MPa and 0.45 MPa respectively [22]. Hence, higher motoring speed is necessary for the FPLG starting strategy, as it leads to a higher compression ratio and higher power output.…”

Section: Hydrogen-di Cylinder Headmentioning

confidence: 99%

“…It was reported that the initial velocity of the piston (motoring velocity) is very important because it influences the escaping velocity (expansion velocity) during the expansion and the following combustion process [22]. The escaping velocity determines the initial velocity for the opposite cylinder in the successive cycle.…”

Section: Hydrogen-di Cylinder Headmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Motoring Voltage on Compression Ratio of a Free-Piston Linear Generator Engine

A.¹,

Ibrahim²,

Aziz³

et al. 2015

J. Mech. Eng. Sci.

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The need for alternative power sources is crucial because of the increase in global energy demand and stringent emission regulations. The free-piston linear generator engine is one of the main alternatives thanks to its high efficiency, wide operating range and low emissions. However, low compression pressure which produces low power generation is an obstacle to its development. In order to increase compression pressure, further development of the motoring process is required. The study investigated the effect of motoring voltage in compression pressure and compression ratio. Motoring voltages varied from 36 V to 84 V. Higher motoring voltage increased piston speed up to 2 m/s which reduced the air leakage and thus produced a sharper p-V profile and higher compression pressure. An inverse relationship between the compression ratio and compression pressure during motoring was also observed.

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Section: Relation Between Battery Capacity Compression Ratio and In-supporting

confidence: 58%

Section: Motoring Fplgmentioning

confidence: 96%

Section: Hydrogen-di Cylinder Headmentioning

confidence: 99%

Section: Hydrogen-di Cylinder Headmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Motoring Voltage on Compression Ratio of a Free-Piston Linear Generator Engine

A.¹,

Ibrahim²,

Aziz³

et al. 2015

J. Mech. Eng. Sci.

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show abstract

“…1,3 Since the linear package contains fewer moving parts compared with conventional crankshaft machine, the FPLA has the advantages including lower friction loss, higher reliability, lower cost, and more durability. [4][5][6][7] It is a simpler and more efficient energy conversion device compared with the conventional crankshaft internal combustion engine.…”

Section: Introductionmentioning

confidence: 99%

Parameters matching requirements for diesel free piston linear alternator start-up

Zuo

Feng

et al. 2015

Advances in Mechanical Engineering

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It is important to identify the relationship between the starting requirements and the structure parameters of the diesel free piston linear alternator on the structural design stage. In this article, the forces applied on the moving part during the starting process are analyzed, and an oscillation model is established. The numerical simulation results of the oscillation model are presented, and the energy-transfer mechanism is analyzed. Then, the oscillation model is simplified by utilizing the energy balance theory. Expressions of the achieved starting frequency and required starting force are derived and the effects of different design variables on them are investigated. The results show that the achieved compression ratio is determined by the energy balance between the friction consumption and the energy supplied by the starting force. The starting frequency achieved and starting force required are associated with the cylinder bore, the moving mass, and effective stroke of the engine, which can be applied to the matching design and optimization of the prototype.

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Effect of Valve Timing on Performance and Emission Characteristics of Producer Gas Fired S.I. Engine

Shah

Poonawala

Channiwala

2020

Lecture Notes in Mechanical Engineering

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Simulation on the effect of the combustion parameters on the piston dynamics and engine performance using the Wiebe function in a free piston engine

Cited by 74 publications

References 15 publications

Effect of Motoring Voltage on Compression Ratio of a Free-Piston Linear Generator Engine

Effect of Motoring Voltage on Compression Ratio of a Free-Piston Linear Generator Engine

Parameters matching requirements for diesel free piston linear alternator start-up

Effect of Valve Timing on Performance and Emission Characteristics of Producer Gas Fired S.I. Engine

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